Our 1971 Oldsmobile "S71" project is powered by a turbocharged Olds V8 that is capable of making some serious power. The stock 10-bolt rear axle assembly was never intended to handle this kind of load, so we chose to run a unit that can take the power - a Currie 9+ rear end. In this video, we explain the thought process behind our decision and the reasons why the 9+ is a suitable choice for this car.